As you know the half-swipe feature was available on the platform for a long time, but recently a few users are claiming that this feature didn’t work anymore, still you can confirm by yourself by following these steps.

1. Go to your snapchat profile

2. And visit the chats 

3. Now, tap on the bitmoji on the person’s chat and swipe right

4. By doing these steps you can use the snapchat half swipe feature

Source: https://getassist.net/how-to-half-swipe-on-snapchat/